fakeFPCheck reports corruption while reclaiming deduplication space

I am reclaiming deduplication storage space manually on a 5200 appliance. I am following the process in TECH180659.

I see a lot of these type of messages:

January 21 08:58:24 INFO [1082194240]: fakeFPCheck: DO 53c8979cafabfcc54c82cf7900fa465a is corrupt
January 21 08:58:26 INFO [1082194240]: fakeFPCheck: DO 546d2e925f2a6325c52884556187e102 is corrupt

And running the garbage collector doesn't seem to clean them up as they show up again the next passof running CR queue processing ( /usr/openv/pdde/pdcr/bin/crcontrol --processqueue).

Is there some way to clean up these corrupt fragments and reclaim the storage space?

Thanks,
Wayne